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Silver Hake: QA/QC Exercise Results

Results of the QA/QC exercises for ageing silver hake.

Silver Hake, Merluccius bilinearis

Christine Kircun (CK) has been working with Silver Hake since 2011. Sectioned otoliths are viewed with reflected light.

In tests where agreement is below 90%, bias indicates either the P-value of a symmetry test or ‘n/s’ (test not significant at the α = 0.05 level). The Evans & Hoenig test was used to test bias starting 1/2022; prior to that, a Bowker's test was used.

Sample Source Test Type Date Completed Age Reader Number Aged Number Tested CV (%) Agree-ment (%) Bias
2022 Spring Survey (202202) Precision 12/2022 CK 1265 100 0.97 96.0  
2022 Commercial Samples (Q1) Precision 10/2022 CK 305 40 0.00 100.0  
2021 Autumn Survey (202104) Precision 7/2022 CK 561 55 6.48 85.5 n/s
2021 Commercial Samples (Q4) Precision 6/2022 CK 580 60 0.73 96.7  
2021 Commercial Samples (Q3) Precision 6/2022 CK 264 40 4.66 85.0 n/s
2021 Commercial Samples (Q2) Precision 6/2022 CK 303 40 2.12 92.5  
2021 Spring Survey (202102) Precision 12/2021 CK 1250 100 2.89 90.0  
2021 Commercial Samples (Q1) Precision 11/2021 CK 692 62 0.00 100.0  
2020 Spring Survey (202002) Precision 5/2021 CK 242 50 0.00 100.0  
2020 Commercial Samples (Q4) Precision 5/2021 CK 954 100 0.28 99.0  
2020 Commercial Samples (Q3) Precision 1/2021 CK 621 70 1.57 95.7  
2020 Commercial Samples (Q2) Precision 12/2020 CK 599 55 0.00 100.0  
2020 Commercial Samples (Q1) Precision 9/2020 CK 460 58 0.00 100.0  
2019 Commercial Samples (Q4) Precision 4/2020 CK 542 43 2.85 93.0  
2019 Autumn Survey (201904) Precision 3/2020 CK 1126 100 2.45 96.0  
2019 Commercial Samples (Q3) Precision 2/2020 CK 548 100 2.72 90.0  
2019 Commercial Samples (Q2) Precision 12/2019 CK 498 76 1.17 94.7  
2019 Spring Survey (201902) Precision 11/2019 CK 1305 100 2.21 93.0  
2019 Commercial Samples (Q1) Precision 10/2019 CK 912 70 0.00 100.0  
2018 Commercial Samples (Q4) Precision 8/2019 CK 713 82 4.63 85.4 n/s
2018 Commercial Samples (Q3) Precision 7/2019 CK 862 100 2.49 88.0 n/s
2018 Autumn Survey (201804) Precision 2/2019 CK 514 69 1.09 97.1  
2018 Commercial Samples (Q2) Precision 2/2019 CK 774 98 1.12 94.9  
2018 Commercial Samples (Q1) Precision 8/2018 CK 695 74 0.00 100.0  
2018 Spring Survey (201802) Precision 7/2018 CK 841 94 1.00 97.9  
2017 Autumn Survey (201704) Precision 5/2018 CK 394 78 0.42 97.4  
2017 Commercial Samples (Q4) Precision 5/2018 CK 471 88 0.41 97.7  
2017 Commercial Samples (Q3) Precision 4/2018 CK 700 93 1.64 93.5  
2017 Spring Survey (201702) Precision 3/2018 CK 1341 88 1.21 95.5  
2017 Commercial Samples (Q2) Precision 2/2018 CK 549 89 2.30 89.9 n/s
2017 Commercial Samples (Q1) Precision 1/2018 CK 839 89 1.57 94.4  
2016 Autumn Survey (201604) Precision 12/2017 CK 838 89 2.06 93.3  
2016 Commercial Samples (Q4) Precision 12/2017 CK 560 68 1.82 94.1  
2016 Commercial Samples (Q3) Precision 12/2017 CK 625 85 3.13 88.2 n/s
2016 Commercial Samples (Q2) Precision 11/2017 CK 808 83 0.91 95.2  
2016 Spring Survey (201602) Precision 11/2017 CK 1802 90 0.57 96.7  
2016 Commercial Samples (Q1) Precision 3/2017 CK 1100 91 2.12 90.1  
2015 Autumn Survey (201504) Precision 11/2016 CK 1319 93 1.92 91.4  
2015 Commercial Samples (Q4) Precision 9/2016 CK 656 88 2.17 93.2  
2015 Commercial Samples (Q3) Precision 8/2016 CK 675 99 1.85 91.9  
2015 Commercial Samples (Q2) Precision 6/2016 CK 757 95 2.25 90.5  
2015 Spring Survey (201502) Precision 12/2015 CK 1481 91 1.95 92.3  
2015 Commercial Samples (Q1) Precision 11/2015 CK 990 93 0.69 96.8  
2014 Commercial Samples (Q4) Precision 5/2015 CK 476 87 2.56 92.0  
2014 Autumn Survey (201404) Precision 4/2015 CK 1161 101 1.68 96.0  
2014 Spring Survey (201402) Precision 10/2014 CK* 1440 97 1.90 91.8  
2013 Autumn Survey (201304) Precision 2/2014 CK* 1101 99 2.49 92.9  
2013 Spring Survey (201302) Precision 1/2014 CK* 1297 100 2.03 91.0  
2012 Spring Survey (201202) Precision 1/2014 CK* 1451 100 1.99 93.0  
2012 Autumn Survey (201204) Precision 11/2013 CK* 1246 99 5.25 86.9 n/s
2011 Autumn Survey (201105) Precision 8/2013 CL 1089 99 3.05 92.9  
2011 Spring Survey (201102) Precision 12/2011 CL 1176 100 2.16 91.0  
2010 Autumn Survey (201004) Precision 7/2011 CL 934 109 6.28 86.2 n/s
2006 Spring Survey (200604) Precision 10/2010 LDW 769 134 2.05 92.5  
2005 Autumn Survey (200510) Precision 10/2010 LDW 717 117 2.91 93.2  
2004 Spring Survey (200402) Precision 10/2005 KL vs. NS 1076 99 5.21 76.8 0.002
2004 Spring Survey (200402) Precision 10/2005 KL 1076 99 1.83 91.9  

 

*CL married to become CK in late 2013.

Last updated by Northeast Fisheries Science Center on December 23, 2022

Age and Growth